Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7178788 | Mechanics Research Communications | 2018 | 9 Pages |
Abstract
Functionally graded elastic annular nano-beams subjected to torsion are studied by a coordinate-free approach. Strain- and stress-driven integral elasticity models are formulated for investigation of structural behavior of beam-like components of nano-electro-mechanical systems (NEMS). The analysis reveals that the Eringen strain-driven fully nonlocal model cannot be used in Structural Mechanics. The stress-driven theory is instead mathematically and mechanically appropriate for nanotechnological applications. Exact solutions of elastic torsional rotations of nano-beams of technical interest are established by adopting the new stress-driven integral relation equipped with error and bi-exponential kernels. Effectiveness of the new nonlocal strategy is tested by comparing the contributed results, with the ones corresponding to the first-gradient elasticity theory and to the Eringen special differential law.
Related Topics
Physical Sciences and Engineering
Engineering
Mechanical Engineering
Authors
Raffaele Barretta, Marina Diaco, Luciano Feo, Raimondo Luciano, Francesco Marotti de Sciarra, Rosa Penna,